Tool-post.



No. 880,948. PATENTED MAR. 3, 1908. H. P. WILHELM &; E. VERO.

TOOL POST.

APPLIcATIoN FILED JAN. 21. 1907.

W/TNE55E5.- W Edwara verm work.

UNITED STATS PATENT FEICE.

HENRY P. WILHELM AND EDWARD VERO, OF MILLVALE, PENNSYLVANIA.

and EDWARD VERO, citizens of the United States of America, residing at Millvale, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Tool-Posts, of which the following is a specification, reference behad therein to the accompanying drawn ing.

This invention relates to tool posts designed for lathes and machinery wherein bits and tools are supported to operate upon a piece of work located within the machine. The object of this invention is to provide liable means are employed for temporarily supporting a tool in a iixed position with relation to the work to be operated upon. To this end, I- have devised a simple and inexpensive tool post having movable gripping blocks for firmly retaining a tool or bit at any desired inclination with relation to a piece of The gripping blocks of the tool post are constructed whereby they may easily accommodate themselves to the inclinationat which a tool or bit is to be supported, thus providing a firm support for a tool or bit while the same is being used.

The detail construction entering into my invention will be hereinafter more fully de- 'scribed and then specifically pointed out in the appended claims, and referring to the drawing forming part of this specification, like numerals of reference designate corresponding parts throughout the several views, in which Figure l is a front elevation of my improved tool post, Eig. 2 is a vertical sectional view of the same, illustrating the gripping blocks thereof in a horizontal position, Fig. 3 is a similar view illustrating the gripping blocks at an inclination, Eig. 4 is a detail sectional view of the upper gripping block, Fig. 5 is a perspective view of the same, Fig. 6 is an elevation of the gripping block illustrating a slightly modified form oi' construction, Fig. 7 is a horizontal sectional view of the same taken on the line xof Fig. 6, Fig. 8 is a vertical sectional view of the modilied form of gripping block.

In the accompanying drawing, I have illustrated a post consisting of a body portion preferably cylindrical in form and is provided with a vertically disposed slot 3 which of the block and tool.

TOOL-POST.

No. 880,948. Specification of Letters Patent.

Application filed January 21, 1907. Serial No. 353,361.

T 0 all whom it may concern: l is formed centrally of the post.

Patented March 3, 1908.

The post is Be it known that we, HENRY P. /VILI-IELM f provided with a vertically disposed screw threaded opening 4 to receive a screw 5, having a rectangular head 6, whereby a spanner wrench or similar wrench may be placed upon the end of the screw to tighten the same upon the tool or bit placed within the slot 3.

Mounted upon the iianged bottom of the post is a ring 2, and resting upon said ring within the slot 3 is a plate 3a having a concave seat 4l to receive a gripping block 8, said block being movably mounted upon the seat la within the slot 3.

My invention resides in the gripping block 7 which constitutes the upper gripping me a novel tool post wherein positive and redium. The block 7 is provided with a socket f 9 semi-spherical in shape and adapted to receive the rounded end 10 of the screw 5, the end of the latter being of a contour to provide an extended contact-surface between the screw and the socket. The outer sides of the socket 9 are provided with two oppositely disposed slots 10a, said slots intersecting the inner sides of the socket 9 whereby a yoke 11 can be placed within the slots 10it to engage in an annular groove 12 formed in the rounded end 10 of the screw 5. groove l2 is best shown in Fig. 4, being of a considerable width and rounded to permit a relative movement of the fingers of the yoke 1l which extend therein to enable the block to be adjusted within prescribed limits. When an excess adjustment is required, the fingers yield laterally to such an extent as will permit the pressure of the screw to be applied on the block direct, the parts resuming their positions after the completion of the Work, by changing the position of the block 8 to bring it closer to a horizontal plane, whereupon the yoke will resume its normal position to retain the parts connected. It is not the intention to provide a structure in which the yoke 11 remains in engagement withthe groove l2 under all circumstances; it is the intention to provide a structure in which the engagement will be maintained under ordinary circumstances and which will carry the block 7 to and from the tool while out of contact with the tool, or until the pressure is applied or removed; during the application of pressure the relative configuration of the screw end and the socket will retain the parts in engagement, l having a lianged bottom 2. The post is and the engagement will extend over a considerable surface to insure a proper binding And when the pressure is applied, the yoke will yield to an extent which will permit the pressure to be applied directly upon the block 7, the fingers of the yoke not being intended to form any portion of the pressure-applying structure at any time. As the pressure is released the block will tend to right itself, and normally this will be su'flicient to cause the yoke to resume its normal position within the groove 12, but, as above stated, if necessary, the block 8 can be shifted, whereupon the engagement of the fingers with the groove will take place. The yoke l1 is preferably constructed of durable wire capable of supporting the block 7 upon the end of the screw- 5, the portions of the sides of the yoke which engage with the groove 12 forming retaining iingers for the block, said fingers being yieldable under pressure. Since the sides of the yoke are parallel with the sides of the slot 3 the gripping block 7 can be readily adjusted to any desiredinclination, and the sides of said block engaging the sides of the slots 3 are adapted to prevent the rotation of the gripping block 7 within said slot.

In Figs. 6 to 8 inclusive, I have illustrated a slight modification wherein the yoke 11 is dispensed with and two pins 16 employed for attaching the gripping block 7 to the end of the screw 5. The pins 16 intercept the socket 9 and engage oppositely disposed sides of the annular groove 1?-, holding said gripping block in engagement with the screw 5 similar to the yoke 11 previously described. In each of the structures shown, the arrangement is such as to permit the surfaces of the yoke 11 or rods 16 which normally lie within the groove 12, to yield laterally to permit the adjustment of the block 7 to its desired inclination. Thisyielding permits the block to be removed by being pulled off of the screw end. After a tool or bit has been placed within the slot 3 between f tool or bit upon the gripping block 8, and

previous to this operation the tool or bit is moved to the desired inclination with relation to the piece of work and then the screw 5 is rotated to firmly hold the tool or bit in its proper position.

The tool post and its appurtenant parts are constructed of strong and durable metal, and from the novel construction of the same, it will be observed that the gripping blocks can be easily removed at any desired time, and dressed to present perfect tool and bit contacting surfaces.

. I do not care to confine myself to the size, proportion and minor details of construction, as the same may be changed without departing from the spirit and scope of the appended claims.

What l claim and desire to secure by Letters Patent is In a tool post, a screw having a rounded lower end, a gripping block having a semispherical socket to receive the rounded end of the screw, the opposing surfaces of the socket and screw-end being formed to provide an extended contact in the direction of thrust of the screw, an annular groove formed on the screw above its rounded end, and yieldable retaining fingers carried by the block, said fingers having portions extending into said groove, said lingers and groove removably holding the block in position on the screw-end in a manner to permit relative movement, whereby the inclination of the gripping face of the block may be varied within normal limits, said iingers being yieldable to retain the extended contact of the opposing faces of the screw-end and socket when the variation is increased.

In testimony whereof we afl-ix our signatures in the presence of two witnesses.

HENRY r. WILHELM. EDWARD vERo.

Witnesses:

LILLIAN E. REED, EDWARD L. REED. 

